theres some benchmarks phoronix did comparing the two_________________A process cannot be understood by stopping it. Understanding must move with the flow of the process, must join it and flow with it.

well i suppose smaller binaries, faster system and not relying on that bearded gnome

It's already faster than GCC? After all these years?

nothing is slower than gcc.

No, gcc still wins most benchmarks on x86. On other architectures it is still far ahead. I would say it's a bad idea.

Clang has plenty of attributes that are more desirable than outright performance. A clean architecture that minimizes the potential to generate incorrect assembly code is one. Such incidents are rare, but they do happen. GCC 4.6 was masked because it generated SSE instructions in sys-boot/grub when it was supposed to restrict itself to 80386 instructions. This caused systems to fail to boot and it took us more than a year before we understood what was happening.